Exoplanet · mini-Neptune
TOI-4156 c
TOI-4156 c is a mini-Neptune orbiting the star TOI-4156. Its year lasts 12.8 Earth days. It was discovered in 2026 by the Transit method.
| Host star | TOI-4156 |
|---|---|
| Distance | 697.1 light-years (213.7 pc) |
| Orbital period | 12.8 days |
| Radius | 2.92 R⊕ · 0.261 R♃ |
| Mass | 8.87 M⊕ · 0.0279 M♃ (estimated from the radius) |
| Density | 1.95 g/cm³ |
| Equilibrium temperature | 809 K (536 °C) |
| Stellar flux received | 101 × Earth |
| Discovery method | Transit |
| Discovery year | 2026 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 101 times the light the Earth does, too hot to keep liquid water on its surface.
In the sky
A telescope is needed to see it: its apparent magnitude is 11.56. Visible from the whole Northern Hemisphere and south to latitude 14° S. North of latitude 14° N it never sets.
Light's journey
The light you see tonight set out around the year 1329. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
Planets in the same system
- TOI-4156 b 4.46-day orbit · 2.54 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.